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COPPER WELDING

COPPER WELDING

COPPER WELDING

(OP)
I HAVE TO BUTT WELD AN ELECTROLITIC COPPER BAR. IT HAS 15 MM IN THICKNESS AND 150 MM WIDE. I NEED THE SAME TENSILE STRENGTH AND ELECTRIC CONDUCTIVITY THAN THE BASE METAL. I THOUGHT IN USE SMAW, GTAW OR BRAZING PROCESS.  
DO ANYBODY HAVE A SUGGESTION OR EXPERIENCE IN THE PROCEDURE SETTING AND ALL THE STEPS THAT I SHOULD FOLLOW?

THANKS.  

RE: COPPER WELDING

Silver soldering should provide the strength you
need, I'm not sure of conductivity.

RE: COPPER WELDING

Parron,
 
You can weld copper.  I had a project a few years back that required welding 0.5 inch (12.5mm) thick copper and 0.25 inch copper plate together on a process vessel.  After 10 years of service there are no problems with the work that was done.  

On your component, there should be not be a problem with electrical conductivity and the tensile strength would be very close if not the same to the base material.  

Most people don't know how to do it or where to go to get it done.  If you want additional help contact me.

RE: COPPER WELDING

Motor manufactures weld copper all the time where electrical and mechanical joint integrity is important. The connectors are insulated so heat must be kept low so a TIG welding process is used. Since the weld penetration will only be say 30 mills deep, electrical contact is enhanced by placing a piece of silver alloy (pre-place foil) between the surfaces before welding; the welding heat melts the alloy at the same time. I think this process is called TIG brazing (?).

RE: COPPER WELDING

Parron,
Depending upon your application and requirements you may want full penitration welds for strength.  
ENC

RE: COPPER WELDING

To provide conductivity we offer to customers ultrasonic welding machine which uses molocular bonding system.
We sell this machine to solar energy comapnies for welding copper fins to copper tubes without loosing conductivity.
for more information our mail address: intersun@siberg.com

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